Bump apache-beam from 2.4.0 to 2.9.0 (#46)

* Bump apache-beam from 2.4.0 to 2.9.0

Bumps [apache-beam](https://beam.apache.org

) from 2.4.0 to 2.9.0.

Signed-off-by: dependabot[bot] <support@dependabot.com>

* removed outdated explicit dependency on protobuf